Window lock



Nov. 18, 1947. J. KEANE 2,431,178

' wnwow LOCK Filed 001;. 2, 1944 ATTORNEY Patented Nov. 18, 1947 UNITED STATES PATENT OFFICE WINDOW LOCK John Keane, New York, N. Y.

Application October 2, 1944, Serial No. 556,692

1 Claim.

This invention relates to window locks, and aims to provide a positive and safe window lock to prevent sliding of the sashes and thereby prevent unauthorized Opening of the window.

Another object of the invention is the provision of a window lock which may be readily attached by an unskilled person, and which is simple in construction and operation as well as inexpensive in cost of manufacture.

The above and other objects will become apparent in the following description, wherein characters of reference refer to like-numbered parts in the accompanying drawings. It is to be noted that the drawings are intended for the purpose of illustration only, and that it is neither desired nor intended to limit the invention necessarily to the specific details of construction shown excepting insofar as they may be deemed essential to the invention.

Referring briefly to the drawings:

Fig. 1 is a fragmentary perspective view, partly in section, of the upper and lower sashes of a window, showing the lock applied to the former.

Fig. 2 is another fragmentary view of the window sashes, showing the lock in side elevation.

Fig. 3 is a cross-sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a cross-sectional view taken on the line 4-4 of Fig. 2.

Fig. 5 is a view similar to Fig. 2, showing the bolt in unlocked position.

Fig. 6 is a cross-sectional view taken on the line 6-6 of Fig. 2.

Referring in detail to the drawings, the numerals iii and H show respectively the upper and lower window sashes, and one of the side frame members of the upper sash is indicated at 52. It is preferably to the member l2 that the lock is attached.

The lock comprises a frame which is substantially L-shaped in plan view and consists of a single plate or the like bent to form the two arms i3 and [4 at right angles to each other. Since the side sash members such as l2 are usually beveled or gouged out substantially as shown, it is advisable that the material of the lock frame be non-resilient so as to maintain a right angle between the arms thereof in spite of the gouged out moulding of the said sash member.

The arm it has, prior to shaping of the device, an upward extension which is bent down against the arm it and shaped as shown to form a cen tral horizontal sleeve-like housing I5 substantially rectangular in cross-section and with the upper and lower strips I6 and H flush against 2 the arm I l. The lower strip I1 is then riveted or otherwise secured against the arm M.

A small vertical strip l8 of the sash member l2 and a relatively wider strip [9 at right angles thereto, provide suitable surfaces for attaching the lock frame to the sash, and therefore holes are provided in the free ends of the arms l3 and I 4 for the reception of screws to attach the lock stably to the sash.

A slide bolt 20 is snugly yet slidably mounted in the sleeve l5 and is provided with a bent extremity 2| which serves as a handle or grip whereby the bolt may be pulled outward or pushed inward into the sleeve. A set screw 22 passes through the outer wall of the housing or sleeve l5 and is adapted to lock the bolt 20 at any position therein. Instead, however, the bolt might be provided with a longitudinal slot and a fixed pin provided instead of the set screw to register in the bolt slot, thereby setting the inward and outward limit stops of the bolt, not shown.

In Figs. 1 and 2 the bolt 20 is shown withdrawn partway from its sleeve l5 and overlapping the lower sash ll. Hence, as is apparent, the bolt provides an obstruction to the lower sash which prevents either sash from being moved. In its other extreme position, shown in Figs. 4 and 5, the bolt handle 2| is clear of the lower sash and thus permits free sliding of either sash. When the bolt is in extended or looking position, the set screw 22 is tightened against the bolt to prevent movement thereof.

It is apparent that when the device is in locking position it would be impossible for an unauthorized person to slide the bolt inward with a tool to unlock the window. Such a safety factor is not present in the common type of pivoted window look, as is well known.

Obviously, modifications in form and structure may be made without departing from the spirit and scope of the invention.

I claim:

An attachment for an upright sash member substantially rectangular in cross-section, comprising a relatively wide base L-shaped in plan view thereby providing a pair of arms at right angles to each other, means for securing said base to said member with one surface of one of said arms flush against one surface of said member and the other of said arms flush against the adjacent surface of said member, said one of said arms having a doubled-back extension from the free end thereof, said doubled back extension having the horizontal edges thereof secured 3 against the horizontal edges of said one of said arms and having the horizontal mid-portion thereof raised from and parallel with said one of said arms thereby providing a longitudinal passage between said raised mid-portion and said one of said arms, said doubled-back extension between said raised mid-portion and said first-named horizontal edges providing upper and lower horizontal Walls closing said passage at the top and bottom respectively thereby providing a rectangular cross-section to said passage, a bolt rectangular in cross-section slidably mounted in said passage and having one end thereof protruding from the passage through one end thereof, said protruding end of said bolt having a rightangle extension thereon to provide a finger grip.

JOHN KEANE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

